Measurement of the Ωc0 lifetime

M. I. Adamivich; E. Albertson; Yu A. Alexandrov; D. Barberis; M. Beck; C. Bérat; W. Beusch; M. Boss; S. Brons; W. Brückner; M. Buénerd; C. Büscher; F. Charignon; J. Chauvin; E. Chudakov; F. Dropmann; J. Engelfried; F. Faller; A. Fournier; S. G. Gerassimov; M. Godbersen; P. Grafström; Th Haller; M. Heidrich; R. B. Hurst; K. Königsmann; I. Konorov; K. Martens; Ph Martin; S. Masciocchi; R. Michaels; U. Müller; C. Newaom; S. Paul; B. Povh; Z. Ren; M. Rey-Campagnolle; G. Rosner; L. Rossi; H. Rudolph; L. Schmitt; H. W. Siebert; A. Simon; V. J. Smith; O. Thilmann; A. Trombini; E. Vesin; B. Volkemer; K. Vorwalter; Th Walcher; G. Wälder; R. Werding; E. Wittmann; M. V. Zavertyaev

doi:10.1016/0370-2693(95)00979-U

Measurement of the Ω_c⁰ lifetime

M. I. Adamivich, E. Albertson, Yu A. Alexandrov, D. Barberis, M. Beck, C. Bérat, W. Beusch, M. Boss, S. Brons, W. Brückner, M. Buénerd, C. Büscher, F. Charignon, J. Chauvin, E. Chudakov, F. Dropmann, J. Engelfried, F. Faller, A. Fournier, S. G. GerassimovM. Godbersen, P. Grafström, Th Haller, M. Heidrich, R. B. Hurst, K. Königsmann, I. Konorov, K. Martens, Ph Martin, S. Masciocchi, R. Michaels, U. Müller, C. Newaom, S. Paul, B. Povh, Z. Ren, M. Rey-Campagnolle, G. Rosner, L. Rossi, H. Rudolph, L. Schmitt, H. W. Siebert, A. Simon, V. J. Smith, O. Thilmann, A. Trombini, E. Vesin, B. Volkemer, K. Vorwalter, Th Walcher, G. Wälder, R. Werding, E. Wittmann, M. V. Zavertyaev

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

We present the measurement of the lifetime of the Ω_c⁰ we have performed using three independent data samples from two different decay modes. Using a Σ^- beam of 340 GeV c we have obtained clean signals for the Ω_c⁰ decaying i Ξ^-K^-π⁺π⁺ and Ω^-π⁺π^-π⁺, avoiding topological cuts normally used in charm analysis. The short but measurable lifetime of the Ω_c⁰ is demonstrated by a clear enhancement of the signals at short but finite decay lengths. Using a continuous maximum likelihood method we determined the lifetime to be τ_{ω_c⁰} = 55^-11+13(stat)_-23⁺¹⁸(syst) fs. This makes the Ω_c⁰ the shortest living weakly decaying particle observed so far. The short value of the lifetime comfirms the predicted pattern of the charmed baryon lifetimes and demonstrates that the strong interaction plays a vital role in the lifetimes of charmed hadrons.

Original language	English
Pages (from-to)	151-161
Number of pages	11
Journal	Physics Letters B
Volume	358
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(95)00979-U
State	Published - 21 Sep 1995
Externally published	Yes

Access to Document

10.1016/0370-2693(95)00979-U

Cite this

Adamivich, M. I., Albertson, E., Alexandrov, Y. A., Barberis, D., Beck, M., Bérat, C., Beusch, W., Boss, M., Brons, S., Brückner, W., Buénerd, M., Büscher, C., Charignon, F., Chauvin, J., Chudakov, E., Dropmann, F., Engelfried, J., Faller, F., Fournier, A., ... Zavertyaev, M. V. (1995). Measurement of the Ω_c⁰ lifetime. Physics Letters B, 358(1-2), 151-161. https://doi.org/10.1016/0370-2693(95)00979-U

@article{c5ab6234af4644c29708b2c14f14c269,

title = "Measurement of the Ωc0 lifetime",

abstract = "We present the measurement of the lifetime of the Ωc0 we have performed using three independent data samples from two different decay modes. Using a Σ- beam of 340 GeV c we have obtained clean signals for the Ωc0 decaying i Ξ-K-π+π+ and Ω-π+π-π+, avoiding topological cuts normally used in charm analysis. The short but measurable lifetime of the Ωc0 is demonstrated by a clear enhancement of the signals at short but finite decay lengths. Using a continuous maximum likelihood method we determined the lifetime to be τωc0 = 55-11+13(stat)-23+18(syst) fs. This makes the Ωc0 the shortest living weakly decaying particle observed so far. The short value of the lifetime comfirms the predicted pattern of the charmed baryon lifetimes and demonstrates that the strong interaction plays a vital role in the lifetimes of charmed hadrons.",

author = "Adamivich, {M. I.} and E. Albertson and Alexandrov, {Yu A.} and D. Barberis and M. Beck and C. B{\'e}rat and W. Beusch and M. Boss and S. Brons and W. Br{\"u}ckner and M. Bu{\'e}nerd and C. B{\"u}scher and F. Charignon and J. Chauvin and E. Chudakov and F. Dropmann and J. Engelfried and F. Faller and A. Fournier and Gerassimov, {S. G.} and M. Godbersen and P. Grafstr{\"o}m and Th Haller and M. Heidrich and Hurst, {R. B.} and K. K{\"o}nigsmann and I. Konorov and K. Martens and Ph Martin and S. Masciocchi and R. Michaels and U. M{\"u}ller and C. Newaom and S. Paul and B. Povh and Z. Ren and M. Rey-Campagnolle and G. Rosner and L. Rossi and H. Rudolph and L. Schmitt and Siebert, {H. W.} and A. Simon and Smith, {V. J.} and O. Thilmann and A. Trombini and E. Vesin and B. Volkemer and K. Vorwalter and Th Walcher and G. W{\"a}lder and R. Werding and E. Wittmann and Zavertyaev, {M. V.}",

year = "1995",

month = sep,

day = "21",

doi = "10.1016/0370-2693(95)00979-U",

language = "English",

volume = "358",

pages = "151--161",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1-2",

}

Adamivich, MI, Albertson, E, Alexandrov, YA, Barberis, D, Beck, M, Bérat, C, Beusch, W, Boss, M, Brons, S, Brückner, W, Buénerd, M, Büscher, C, Charignon, F, Chauvin, J, Chudakov, E, Dropmann, F, Engelfried, J, Faller, F, Fournier, A, Gerassimov, SG, Godbersen, M, Grafström, P, Haller, T, Heidrich, M, Hurst, RB, Königsmann, K, Konorov, I, Martens, K, Martin, P, Masciocchi, S, Michaels, R, Müller, U, Newaom, C, Paul, S, Povh, B, Ren, Z, Rey-Campagnolle, M, Rosner, G, Rossi, L, Rudolph, H, Schmitt, L, Siebert, HW, Simon, A, Smith, VJ, Thilmann, O, Trombini, A, Vesin, E, Volkemer, B, Vorwalter, K, Walcher, T, Wälder, G, Werding, R, Wittmann, E & Zavertyaev, MV 1995, 'Measurement of the Ω_c⁰ lifetime', Physics Letters B, vol. 358, no. 1-2, pp. 151-161. https://doi.org/10.1016/0370-2693(95)00979-U

TY - JOUR

T1 - Measurement of the Ωc0 lifetime

AU - Adamivich, M. I.

AU - Albertson, E.

AU - Alexandrov, Yu A.

AU - Barberis, D.

AU - Beck, M.

AU - Bérat, C.

AU - Beusch, W.

AU - Boss, M.

AU - Brons, S.

AU - Brückner, W.

AU - Buénerd, M.

AU - Büscher, C.

AU - Charignon, F.

AU - Chauvin, J.

AU - Chudakov, E.

AU - Dropmann, F.

AU - Engelfried, J.

AU - Faller, F.

AU - Fournier, A.

AU - Gerassimov, S. G.

AU - Godbersen, M.

AU - Grafström, P.

AU - Haller, Th

AU - Heidrich, M.

AU - Hurst, R. B.

AU - Königsmann, K.

AU - Konorov, I.

AU - Martens, K.

AU - Martin, Ph

AU - Masciocchi, S.

AU - Michaels, R.

AU - Müller, U.

AU - Newaom, C.

AU - Paul, S.

AU - Povh, B.

AU - Ren, Z.

AU - Rey-Campagnolle, M.

AU - Rosner, G.

AU - Rossi, L.

AU - Rudolph, H.

AU - Schmitt, L.

AU - Siebert, H. W.

AU - Simon, A.

AU - Smith, V. J.

AU - Thilmann, O.

AU - Trombini, A.

AU - Vesin, E.

AU - Volkemer, B.

AU - Vorwalter, K.

AU - Walcher, Th

AU - Wälder, G.

AU - Werding, R.

AU - Wittmann, E.

AU - Zavertyaev, M. V.

PY - 1995/9/21

Y1 - 1995/9/21

N2 - We present the measurement of the lifetime of the Ωc0 we have performed using three independent data samples from two different decay modes. Using a Σ- beam of 340 GeV c we have obtained clean signals for the Ωc0 decaying i Ξ-K-π+π+ and Ω-π+π-π+, avoiding topological cuts normally used in charm analysis. The short but measurable lifetime of the Ωc0 is demonstrated by a clear enhancement of the signals at short but finite decay lengths. Using a continuous maximum likelihood method we determined the lifetime to be τωc0 = 55-11+13(stat)-23+18(syst) fs. This makes the Ωc0 the shortest living weakly decaying particle observed so far. The short value of the lifetime comfirms the predicted pattern of the charmed baryon lifetimes and demonstrates that the strong interaction plays a vital role in the lifetimes of charmed hadrons.

AB - We present the measurement of the lifetime of the Ωc0 we have performed using three independent data samples from two different decay modes. Using a Σ- beam of 340 GeV c we have obtained clean signals for the Ωc0 decaying i Ξ-K-π+π+ and Ω-π+π-π+, avoiding topological cuts normally used in charm analysis. The short but measurable lifetime of the Ωc0 is demonstrated by a clear enhancement of the signals at short but finite decay lengths. Using a continuous maximum likelihood method we determined the lifetime to be τωc0 = 55-11+13(stat)-23+18(syst) fs. This makes the Ωc0 the shortest living weakly decaying particle observed so far. The short value of the lifetime comfirms the predicted pattern of the charmed baryon lifetimes and demonstrates that the strong interaction plays a vital role in the lifetimes of charmed hadrons.

UR - http://www.scopus.com/inward/record.url?scp=0000863731&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(95)00979-U

DO - 10.1016/0370-2693(95)00979-U

M3 - Article

AN - SCOPUS:0000863731

SN - 0370-2693

VL - 358

SP - 151

EP - 161

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Measurement of the Ω_c⁰ lifetime

Abstract

Access to Document

Other files and links

Fingerprint

Cite this